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Changed timer base frequency on XT models to 14.318MHz - PIT, CGA and 4.77MHz CPU should now stay in perfect sync.

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TomW 2015-11-25 21:50:38 +00:00
commit 79202cc5c0
10 changed files with 49 additions and 29 deletions
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5
src/808x.c
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@ -20,6 +20,7 @@
#include "timer.h"
#include "x86.h"
int xt_cpu_multi;
int nmi = 0;
int nextcyc=0;
@ -807,7 +808,7 @@ void clockhardware()
current_diff += diff;
timer_end_period(cycles);
timer_end_period(cycles*xt_cpu_multi);
}
static int takeint = 0;
@ -1084,7 +1085,7 @@ void execx86(int cycs)
// if (pc==0x96B && cs==0x9E040) { printf("Hit it\n"); output=1; timetolive=150; }
// if (pc<0x8000) printf("%04X : %04X %04X %04X %04X %04X %04X %04X %04X %04X %04X %04X %04X %02X %04X %i\n",pc,AX,BX,CX,DX,cs>>4,ds>>4,es>>4,ss>>4,DI,SI,BP,SP,opcode,flags,disctime);
cycdiff=cycles;
timer_start_period(cycles);
timer_start_period(cycles*xt_cpu_multi);
current_diff = 0;
cycles-=nextcyc;
// if (instime) pclog("Cycles %i %i\n",cycles,cycdiff);